Nut-tapping machine.



E. H. CHAPMAN.

NUT TAPPING MACHINE.

APPLICATION FILED MAY 14, 1913.

1,?7,595 Patented Nov. 4, 1913,

WITNESSES INVENTOR BY M J6. ffww.

we ant-e.

NUT-TAPPING MACHINE.

Specification of Letters Patent.

Patented Nov. 4, 1913.

Application filed May 14, 1913. Serial No. 767,586.

To all whom it may concern Be it known that I, EDWARD H. CHAP- MAN, acitizen of the United States, residing in the city and county of SanFrancisco, State of California, have invented a new and usefulNut-Tapping Machine, of which the following is a specification.

My invention consists of an improved nuttapping machine in which thenuts to be tapped are fed from a magazine to a rotating tap havinganoutwardly curved, smooth shank upon which the tapped nuts aresuccessively collected and from which they are finally discharged, onenut on the cutting end of the tap successively crowding off a nutat thedischarge end of the curved shank.

It further consists of improved means for retaining the next succeedingnut in the magazine while a nut preceding it is being tapped.

It further consists of improved means for yieldingly retaining thetapped nuts upon the curved shank'of the tap to be successively crowdedoif as additional nuts accumulate upon the tap.

It further consists of other novel features of construction, all as willbe hereinafter fully set forth.

The annexed drawings and the following description set forth in detailone mechanical form embodying the invention, such detail constructionbeing but one of various mechanical forms in which the principle of theinvention may be used.

In said annexed drawingsFigure 1 represents a vertical sectional view ofas much of a nut-tapping machine embodying my invention as willillustrate the same. Fig. 2 represents an enlarged sectional view of aportion of the magazine, the nut-guide and the tap.

Similar numerals of reference indicate corresponding parts in thefigures.

Referring to the drawings, the reference numerall indicates the frameor'bed of the machine carrying a pedestal, 2, having a horizontalbearing, 3. A sleeve, 4, is journaled in said bearing and has a gear, 5,secured upon it for rotating it. A nut-guiding tube, 6, is secured insaid sleeve and has its rear portion, 7, laterally curved. Abushing, 8,is secured in the outer end of said laterally curved portion. Springs,9, having inwardly bent free ends, 10, are secured upon the outer sidesof the laterally curved portion of the nut-guiding tube.

portion of the guide-tube, and have the inwardly bent ends projectingpartly across the open end of the tube to retain the nuts in the samebut capable of being spread to release the same by pressure upon thecolumn of nuts within the tube. A nut-guide, 11, is supported upon themachine-bed in axial alinement with the forward end of the guide-tube,and the bore of said guide is of suflic-ient diameter to admit of thetapped nuts rotating within the same. A tap, 12, has a smooth shank, 13,which is adapted to axially pass through the nutguide and the straightportion of the nutguiding tube, and has a curved portion, 14, whichpasses through the laterally curved The tap, proper, projects beyond thenut-guide. A vertical or substantially upright magazine, 15, is slidablysupported upon the machinebed to have its lower end register with thenut-guide and the end oft-he rotating nutguiding tube and the tap, andsaid magazine is so constructed as to contain a column of nut-blankswhich may be fed at the upper end of the magazine and slide edgewise :in

.the magazine. The lower end of the magazine has an opening, 16, throughwhich a nut-blank can be drawn outas the tapping tool enters and tapsthe same. The face of the magazine has an opening, 17 registering with apin, 18, projecting from the face of the nut-guide, and said opening andpin register with the hole in the blank next succeeding the nut blank,being tapped in the lowermost end of the magazine. The magazine and itspedestal are movable upon the ma chine-bed and may be drawn toward andfrom the tap and nut-guide by means of a screw, 19, corresponding to thethreads in,

placed upon the tap and within the nut-guidin tube to steady the tapwithin the latter. W hen the magazine is loaded with nutblanks, 24, andthe spindle or sleeve and the nut-guiding tube and the tap therein arethe pin upon the latter engages the hole in the nut-blank in themagazine above the one being tapped and holds the same in place. Whenthe nut is tapped, the magazine is drawn back, the tapped nut remalnsupon the tap and is drawn out of the magazine,

and, as soon as the pin is released from the next nut-blank in themagazine, such blank drops down and the magazine is again fed to thetap, to thread such next nut, and so forth, the nut-blanks being fedinto the magazine as the tapped nuts are withdrawn. The tapped nuts passfrom the tap to the smooth shank of the same, and as tapped nuts arethus fed through the nut-guiding tube, the 'nuts are successivelycrowded out to spread the retaining springs and allow the nuts to one byone drop out of the end of the tube. A casing, 20, preferably surroundsthe laterally curved portion of the nut-guiding tube to catch the tappednuts and guide them to a suitable receptacle.

Any suitable means may be provided to feed the magazine toward and fromthe tap. In the drawings is disclosed a screw, 19, threaded tocorrespond to the threads of the tap, and journaled in the machine bedand connected by suitable gearing, 25, to rotate in the same directionas the tap. The screw engages a nut, 26, upon the base of the pedestal,27, which carries the magazine and slides upon the machine-bed, and saidnut is of such construction that it may be disengaged from the screwwhen a nut is tapped, whereupon the pedestal can be manually slid backby a handle, 28, or otherwise moved by suitable means not forming anypart of the present invention.

Other modes of applying the principle of my invention may be employedfor the mode herein explained. Change may therefore be made as regardsthe mechanism thus disclosed, provided the principles of constructionset forth respectively in the following claims are employed.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is

1. In a nut-tapping machine, a rotatable nut-guiding tube having alaterally curved rear portion, a tap in such tube and having its smoothshank correspondingly curved, means for successively feeding nut-blanksupon said tap and shank, and springs secured to the sides of the rearportion of said nut-guiding tube and having inwardly bent endsprojecting partly across the open end of the same.

2. In a nut-tapping machine, a rotatable nut-guiding tube, a nutguideregistering with said tube, a tap in said tube and guide and projectingbeyond the latter, a magazine adapted to contain a column of edgewisearranged nut-blanks and formed with a dis charge-opening registeringwith the nutguide and through which the tapped nut may be Withdrawn andwith an opening registering with the hole in the next adjoining nut,means for moving such magazine toward and from said tap and nut-guide,and a pin upon the nut-guide and adapted to enter the opening in themagazine and the hole of the nut-blank adjoining the one being tapped tohold the column of blanks until the tapped nut is withdrawn.

' EDWARD H. CHAPMAN.

Witnesses:

MARK P. SARRINE, MAURICE ASHE.

